Which of the following options means that the fog which has been polluted by smoke?
A. Skog
B. Pollutant
C. Clog
D. Smog

Question

Which of the following options means that the fog which has been polluted by smoke?A. SkogB. PollutantC. ClogD. Smog

Prepp Team · Accepted Answer

Understanding Smog: Fog Polluted by Smoke

The question asks for the specific term used to describe fog that has been polluted by smoke. This phenomenon is a significant environmental issue, particularly in urban areas.

Defining the Term

Let's look at the options provided and determine which one correctly identifies fog polluted by smoke.

Skog: This is not a recognized word in the English language used to describe atmospheric conditions.
Pollutant: A pollutant is a substance that contaminates something, especially the environment. Smoke is a pollutant, but 'pollutant' itself doesn't describe the mixture of fog and smoke.
Clog: Clog means to block something or become blocked. This term is not related to atmospheric pollution or fog.
Smog: Smog is a portmanteau word, formed by combining the words 'smoke' and 'fog'. It specifically refers to a type of air pollution that forms when fog mixes with smoke particles, often from burning fossil fuels.

Based on the definitions, the term that means fog polluted by smoke is Smog.

Detailed Analysis of Options

Option	Meaning/Definition	Relevance to "fog polluted by smoke"
A. Skog	Not a standard English word.	Irrelevant
B. Pollutant	A substance that pollutes.	Smoke is a pollutant, but this word doesn't describe the mixture.
C. Clog	To block or obstruct.	Irrelevant
D. Smog	A mixture of smoke and fog; fog polluted by smoke.	Directly matches the description in the question.

Therefore, the correct term for fog which has been polluted by smoke is smog.

Revision Table: Key Terms

Term	Simple Definition
Fog	A thick cloud of water droplets or ice crystals near the ground.
Smoke	Particles and gases produced by burning.
Pollution	The presence in or introduction into the environment of a substance which has harmful or poisonous effects.
Smog	Fog combined with smoke and other atmospheric pollutants.

Additional Information on Smog and Air Pollution

Smog is a visible type of air pollution. Historically, it was associated with industrial areas where burning coal produced large amounts of smoke and sulfur dioxide, mixing with fog to create "London smog". Today, in many parts of the world, especially in cities with heavy traffic, smog is primarily photochemical smog, formed when sunlight reacts with pollutants like nitrogen oxides and volatile organic compounds from vehicles and industries. This modern smog contains ozone and other harmful substances.

Understanding the term smog and its composition is important for studying air quality and its impact on health and the environment. Smog can cause respiratory problems, reduce visibility, and damage vegetation.